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Home/ Questions/Q 952089
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Editorial Team
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Editorial Team
Asked: May 15, 20262026-05-15T23:50:11+00:00 2026-05-15T23:50:11+00:00

In my app.config I put <appender name=RollingFileAppender type=log4net.Appender.RollingFileAppender> <file value=%programdata%/log-file.txt/> but it didn’t work.

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In my app.config I put

<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
  <file value="%programdata%/log-file.txt"/>

but it didn’t work. Any ideas?

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  1. Editorial Team
    Editorial Team
    2026-05-15T23:50:12+00:00Added an answer on May 15, 2026 at 11:50 pm

    The log4net syntax for expanding environment variables is “${Variable}” e.g.

    <file value="${LOCALAPPDATA}\GojiSoft\GojiLog\log.txt" />
    
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